JP7226682B2 - Carrier tape body and carrier tape - Google Patents

Description

The present disclosure relates to carrier tape bodies and carrier tapes.

Conventionally, electronic components such as bare chips (bare dies) and IC chips are housed in a pocket portion of a carrier tape body for transportation, storage, and supply to an electronic component mounting apparatus (Patent Document 1). reference).

In general, the carrier tape body is sealed with an upper surface cover tape in a state in which electronic components are stored in pockets to form a carrier tape.

U.S. Patent Publication No. 20150289427

By the way, in carrier tapes containing low-height parts such as bare dies, the electronic parts in the pocket may run over the corner R of the upper side wall of the pocket after sealing with the top cover tape. In this regard, it is possible to suppress riding-on by reducing the angle R, but if the height is further reduced, it becomes difficult to appropriately suppress riding-on only by adjusting the angle R.

Therefore, in one aspect, an object of the present invention is to appropriately suppress running over even an electronic component having a relatively small thickness.

One aspect provides the following solutions.

(1) A carrier tape body in which pockets capable of storing electronic components are provided at predetermined intervals in the longitudinal direction,
It has recesses between the plurality of pocket portions in the longitudinal direction, and the recesses are joining portions to which the top cover tape is joined when the top cover tape is attached in a manner covering the pocket portions and the recesses. It is a carrier tape body that functions as a carrier tape.

(2) In the configuration of (1) above, the distance between the plurality of pocket portions in the longitudinal direction is 1.6 mm or more and 3.0 mm or less, and the depth of the recess is 0.2 mm or more and 0.2 mm or more. It is characterized by being 3 mm or less.

(3) In the configuration of (1) above, the distance between the plurality of pocket portions in the longitudinal direction is 1.0 mm or more and less than 1.6 mm, and the depth of the recess is 0.05 mm or more and 0.2 mm. It is characterized by the following.

(4) In any one of the above (1) to (3), the width of the concave portion perpendicular to the longitudinal direction is substantially the same as that of the pocket portion.

(5) a carrier tape main body having a plurality of pocket portions capable of accommodating electronic components provided at predetermined intervals in the longitudinal direction, and having concave portions between the plurality of pocket portions in the longitudinal direction;
a top cover tape attached to the carrier tape body in a manner covering the pocket portion and the recess,
The top cover tape is a carrier tape joined to the recess.

In one aspect, according to the present invention, it is possible to appropriately suppress even an electronic component having a relatively small thickness from being run over.

It is a perspective view which shows the carrier tape main body which concerns on this embodiment. It is a three-sided view of a carrier tape main body. FIG. 4 is an explanatory diagram of a joint region of a top cover tape; FIG. 4 is a cross-sectional view showing the carrier tape body to which the top cover tape is attached; FIG. 5 is a cross-sectional view of a configuration of a comparative example; FIG. 10 is an explanatory diagram of riding over of an electronic component; It is explanatory drawing of the riding-on suppression of an electronic component. It is explanatory drawing (comparative example) of running over of an electronic component. It is a table|surface figure which shows a test example. It is a table|surface figure which shows a test example (comparative example). FIG. 5 is a table showing various parameters when the electronic component does not run over the upper portion of the side wall of the pocket portion; FIG. 2 is a perspective view schematically showing part of a mold suitable for manufacturing a carrier tape body according to the present embodiment;

Hereinafter, each embodiment will be described in detail with reference to the accompanying drawings. In addition, in the accompanying drawings, for the sake of clarity, there are cases in which only a part of a plurality of parts having the same attribute are given reference numerals.

FIG. 1 is a perspective view showing a carrier tape body 110 according to this embodiment. FIG. 2 is a trihedral view of the carrier tape body 110. FIG. FIG. 3 is an explanatory diagram of the joint region of the top cover tape 70. As shown in FIG. FIG. 4A is a cross-sectional view showing the carrier tape body 110 to which the top cover tape 70 is attached. In addition, illustration of electronic components is omitted in FIG. 4A (as well as in FIG. 4B described later). 1 and 2, etc., the longitudinal direction of the carrier tape body 110 is indicated by the X direction, and the width direction thereof is indicated by the Y direction. Below, a top view means a case of viewing in a direction perpendicular to the XY plane. Hereinafter, "longitudinal direction" means the longitudinal direction of the carrier tape body 110, that is, the X direction. 1 and 2, only a part of the carrier tape body 110 is shown in the longitudinal direction.

The carrier tape main body 110 is formed by processing a tape-shaped base material having a thickness of 0.2 mm to 0.6 mm. Tape-shaped substrates are made of, for example, synthetic resins such as polyvinyl chloride, polystyrene, amorphous polyethylene terephthalate, polycarbonate, polypropylene, or the like, carbon kneaded into these resins to impart conductivity, or conductive coatings applied to the surface. made up of things. The width of the carrier tape main body 110 is generally about 8 mm to 24 mm.

The carrier tape main body 110 is provided with pocket portions (embossments) 11 for storing electronic components at predetermined intervals in the longitudinal direction. The pocket portion 11 corresponds to the shape and size of the electronic component to be housed, and is rectangular in top view in the present embodiment. The shape of the pocket portion 11 may be elliptical, circular, or the like.

The pocket 11 is a non-penetrating recess and has a bottom. The depth of the pocket portion 11 is arbitrary, but is determined according to the height of the electronic component to be stored. That is, the depth of the pocket portion 11 may be slightly larger than the height of the electronic component to be stored.

The pocket portion 11 has side walls 11a on four sides (see FIG. 6A), and the upper portions of the side walls 11a (hereinafter also referred to as "side wall upper portions") are rounded.

The pocket portions 11 are provided at equal intervals in the longitudinal direction at a predetermined pitch Pt1. Although the predetermined pitch Pt1 is arbitrary, some examples will be described later.

In the carrier tape main body 110, a plurality of feed holes (sprocket holes) 12 used for positioning in a mounting device or the like are bored in one or both sides of the pocket portion 11 at predetermined intervals in the longitudinal direction. The shape and spacing of the feed holes 12 are preferably formed in accordance with a feed mechanism such as a sprocket. In addition, the diameter of the feed hole 12 is about 0.8 mm to 1.5 mm.

In this embodiment, as shown in FIGS. 1 and 2, the carrier tape body 110 has recesses 20 between the pocket portions 11 in the longitudinal direction.

The recess 20 is non-penetrating and has a bottom 22 . The depth of the concave portion 20 is arbitrary as long as it has the bottom portion 22 , but may be determined according to the interval (predetermined pitch) of the pocket portions 11 . The concave portion 20 has the same shape as the pocket portion 11, but has a different function. Although the function of the concave portion 20 will be described in detail later, the concave portion 20 has a function of preventing electronic components from riding on the bottom portion 22 by bonding the top cover tape 70 to the bottom portion 22 .

The recesses 20 are provided at equal intervals in the longitudinal direction at a predetermined pitch Pt1. The predetermined pitch Pt1 is the same as the pitch Pt1 of the pocket portions 11 .

In this manner, in the present embodiment, the convex portion 14 is formed between the concave portion 20 and the pocket portion 11 in the X direction and has a convex shape upward when viewed in the Y direction. The convex portion 14 extends linearly in the Y direction. The dimension of the projection 14 in the X direction may be, for example, within the range of 0.03 mm to 1.5 mm. The convex portion 14 has a convex shape in cross section in the X direction passing through the pocket portion 11 and has an upper surface that is flush with the upper surface of the basic portion 110 a of the carrier tape body 110 . That is, the convex portion 14 can be said to be part of the basic portion 110 a of the carrier tape body 110 .

Although the depth of the recess 20 is smaller than the depth of the pocket 11 in FIG. 4A, the depth of the recess 20 may be the same as the depth of the pocket 11, or the depth of the recess 20 may be , may be greater than the depth of the pocket portion 11 . In particular, in this embodiment, the concave portion 20 has a function of applying tension to the top cover tape 70 in the X direction as described later, so it is useful to have a relatively large depth in order to enhance this function. . From this point of view, it is preferable that the depth of the concave portion 20 is greater than the depth of the pocket portion 11 . A preferred range of the depth of the recess 20 will be described later.

The shape of the recess 20 is rectangular in top view in the present embodiment. The shape of the concave portion 20 may be elliptical, circular, or the like.

The top cover tape 70 is applied to the upper surface of the carrier tape body 110 as shown in FIG. 4A. The top cover tape 70 is attached to the carrier tape main body 110 after placing the electronic components in the pocket portion 11 (covering the carrier tape main body 110 so as to cover the pocket portion 11). The carrier tape main body 110 to which the top cover tape 70 is attached is called a "carrier tape".

The top cover tape 70 is a tape-shaped base material formed using a synthetic resin such as polystyrene, polyethylene terephthalate (PET), polycarbonate, polyamide (PA), polyethylene naphthalate (PEN), or polypropylene (PP). be. It should be noted that these synthetic resins may be kneaded with carbon to impart conductivity, may be subjected to a conductive coating on the surface of the tape-shaped base material, or may be used to impart antistatic properties. .

The top cover tape 70 has an adhesive layer formed of an adhesive or pressure-sensitive adhesive on the bonding area 71 on the surface of the carrier tape body 110 side. As the adhesive, acrylic resin-based, natural rubber-based, urethane-based, epoxy-based, polyvinyl alcohol-based, and the like can be used.

The joint region 71 includes linear regions 71a and 71b and a dotted region 71c.

The linear regions 71a and 71b are separated by a predetermined distance L in the Y direction and extend parallel to the X direction. Although the linear regions 71a and 71b are continuous in the X direction, they may be set discontinuously in the X direction. The predetermined distance L is arbitrary as long as it is equal to or greater than the dimension of the pocket portion 11 in the Y direction, but is preferably substantially the same as the dimension of the pocket portion 11 in the Y direction. In this case, when the top cover tape 70 is attached to the carrier tape body 110, the linear regions 71a and 71b extend continuously along the X direction at positions on both sides of the pocket portion 11 in the Y direction. do.

The dotted area 71c is set in a manner positioned between the linear areas 71a and 71b in the Y direction. The dotted regions 71c are provided at regular intervals in the X direction at a predetermined pitch Pt2. The predetermined pitch Pt2 is substantially the same as the pitch Pt1 of the pocket portions 11 . The dotted region 71 c is formed so as to be positioned substantially at the center of the bottom portion 22 of the recess 20 when the top cover tape 70 is attached to the carrier tape body 110 . Note that, in a modification, two or more dotted regions 71 c may be set for one recess 20 . In this case, two or more dotted regions 71c may be set in a manner lined up in the X direction. Alternatively, two or more dotted regions 71c may be replaced with one linear region.

Basically, the top cover tape 70 is continuously sealed to the carrier tape body 110 along the X direction at positions on both sides of the pocket portion 11 in the Y direction by the linear regions 71a and 71b described above.

Also, in this embodiment, the top cover tape 70 is further sealed to the carrier tape body 110 at the positions of the recesses 20 as shown in FIG. 4A by the above-described dotted regions 71c. FIG. 4A shows a cross section passing through the central position of the pocket portion 11 in the Y direction.

Next, the effects of the present invention will be described in comparison with comparative examples. Here, first, referring to FIG. 5, the principle of riding on electronic components will be described, and then, using FIGS. will be explained.

FIG. 4B is a cross-sectional view showing the relationship between a carrier tape body 110A and a top cover tape 70A according to a comparative example, and corresponds to the cross-sectional view of FIG. 4A. 110 A of carrier tape main bodies by a comparative example differ in the point which does not have the recessed part 20 with respect to the carrier tape main body 110 by this embodiment. Therefore, in the carrier tape main body 110A, a flat bank portion 90 is formed between the pocket portions 11 in the X direction. Also, the top cover tape 70A according to the comparative example differs from the top cover tape 70 according to the present embodiment in that it does not have the point-like regions 71c.

FIG. 5 is a cross-sectional view showing the electronic component S that has run over the upper portion of the side wall of the pocket portion 11. FIG.

The electronic component S in the pocket portion 11 moves within the pocket portion 11 due to vibration or the like that occurs during transportation, and as shown in FIG. It may climb. In addition, as a mode in which the electronic component S rides on the upper portion of the side wall 11a of the pocket portion 11 (side wall upper portion), as shown in FIG. In some cases, the side portion of S is caught between the top cover tape 70 and the upper portion of the side wall of the pocket portion 11 . If such riding occurs, trouble may occur when the electronic component S is picked up from the carrier tape by the suction means or the like of the mounting apparatus.

The side portion of the electronic component S may be caught in the gap formed between the corner R of the upper side wall of the pocket portion 11 and the top cover tape 70, but such a gap can be reduced by reducing the corner R. be. In general, the angle R has a lower limit value from the viewpoint of manufacturing. Therefore, in this embodiment, the angle R is set to a value greater than 0, and may be set to the lower limit from the viewpoint of manufacturing.

Further, the top cover tape 70 is separated upward from the upper part of the side wall of the pocket part 11 at the upper end point of the corner R of the upper part of the side wall of the pocket part 11 (see point Pt in FIG. 5, hereinafter referred to as "R end"). If the vertical gap is larger than the thickness of the side portion of the electronic component S (that is, the thickness of the electronic component S), the side portion of the electronic component S is likely to be caught in the vertical gap.

Therefore, when the electronic component S rides on the upper portion of the side wall of the pocket portion 11, the lifting of the top cover tape 70 at the R end is greater than the thickness of the side portion of the electronic component S (that is, the thickness of the electronic component S). The larger it is, the more likely it will occur. If the thickness of the electronic component is relatively small, even if the upward lifting of the top cover tape 70 at the R end is relatively small, it may run over the top cover tape 70 . ), it can be said that run-over is likely to occur.

FIGS. 6A and 6B are schematic explanatory diagrams of riding over of an electronic component, and are schematic diagrams (schematic diagrams) corresponding to enlarged views of the portion Q in FIGS. 4A and 4B, respectively. FIG. 6A shows the case of this embodiment, and FIG. 6B shows the case of a comparative example (FIG. 4B). 6A and 6B show the electronic component S in the pocket portion 11. FIG.

In the comparative example, as shown in FIG. 6B, the top cover tape 70A tends to cause the electronic component S to ride on the upper portion of the side wall 11a of the pocket portion 11 (side wall upper portion). Although the top cover tape 70A extends substantially flat in the region between the pocket portions 11 in the X direction, the top cover tape 70A positively abuts near the corner R of the upper side wall of the pocket portion 11. This is because there is no means for causing the gap Δ1 to occur due to slight lifting at the R end Pt.

On the other hand, in the present embodiment, as shown in FIG. 6A, the top cover tape 70 makes it difficult for the electronic component S to ride on the upper portion of the side wall of the pocket portion 11 . This is because the top cover tape 70 is joined to the carrier tape main body 110 at the dotted regions 71c in the concave portions 20 in the regions between the pocket portions 11 in the X direction. That is, in this case, since the top cover tape 70 extends downward in the region between the pocket portions 11 in the X direction, it slightly rises above the side wall of the pocket portion 11 (slight rise at the R end Pt). This is because it is difficult to generate

More specifically, in the present embodiment, as shown in FIGS. 4A and 6A, the upper surface of the convex portion 14 between the concave portion 20 and the pocket portion 11 in the X direction easily contacts the top cover tape 70 . This is particularly the effect produced by bonding the top cover tape 70 to the carrier tape main body 110 at the dotted areas 71 c in the recess 20 . When the top cover tape 70 is joined to the carrier tape main body 110 at the dotted region 71c of the concave portion 20, tension in the X direction tends to be generated on the top cover tape 70. Then, the upper surface of the projection 14 tends to come into contact with the top cover tape 70 .

In this manner, according to the present embodiment, by providing the recess 20 to which the top cover tape 70 is joined, the possibility of electronic components running over the upper portion of the side wall of the pocket portion 11 is reduced compared to the comparative example. can be reduced. Hereinafter, the function of generating tension in the X direction in the top cover tape 70 by joining the top cover tape 70 at the bottom 22 of the recess 20 is also referred to as "the tension generating function by dot sealing".

Further, according to the present embodiment, as described above, the tension generating function of the dot seal can suppress slight lifting of the top cover tape 70 at the R end Pt on the upper side wall of the pocket portion 11 . As a result, it is possible to appropriately prevent even an electronic component having a relatively small thickness from being run over.

Here, the electronic component riding on the upper part of the side wall of the pocket part 11 in the X direction as described above can occur at any position in the Y direction on the upper part of the side wall of the pocket part 11 on both sides in the X direction. Therefore, in this embodiment, the recess 20 preferably extends over substantially the entire extension range of the pocket portion 11 in the Y direction. In other words, the width of the concave portion 20 in the Y direction is substantially the same as that of the pocket portion 11 . “Substantially the same” is a concept that permits a difference of about 10% in the width of the pocket portion 11 in the Y direction. As a result, the effect of the tension generating function by the dot seal can be generated over substantially the entire upper portion of the side wall of the pocket portion 11 in the Y direction. In other words, it is possible to prevent the electronic component from running over the upper portion of the side wall of the pocket portion 11 over substantially the entire Y direction of the upper portion of the side wall of the pocket portion 11 .

In addition, in the present embodiment, as described above, the run-on of the electronic component on the upper part of the side wall of the pocket portion 11 in the X direction is suppressed by the tension generating function of the dot seal in the concave portion 20. , can also occur in the Y direction. The electronic component riding on the upper portion of the side wall of the pocket portion 11 in the Y direction cannot be suppressed by the tension generating function of the dot seal in the concave portion 20 .

In this regard, in the present embodiment, although a concave portion such as the concave portion 20 is not provided adjacent to the pocket portion 11 in the Y direction, as described above, the sealing position of the top cover tape 70 with respect to the carrier tape main body 110 is set in the Y direction. By setting it in the vicinity of the edge of the pocket portion 11 in the direction, it is possible to suppress the electronic component from running over the upper portion of the side wall of the pocket portion 11 on both sides in the Y direction. Since it is difficult to apply tension to the top cover tape 70 in the Y direction, it is effective to prevent the electronic components from running over the side walls of the pocket portion 11 on both sides in the Y direction, depending on the seal position. However, in a modified example, tension may be applied to the top cover tape 70 in the Y direction by forming a recess adjacent to the pocket portion 11 in the Y direction and joining the top cover tape 70 in the recess. .

7A and 7B are table diagrams showing test examples, FIG. 7A showing the case of this embodiment, and FIG. 7B showing the case of a comparative example (FIG. 4B).

In the test, the thickness of the electronic component (referred to as “PKG thickness” in FIGS. 7A and 7B) was varied from 0.05 mm to 0.50 mm, and the corner R of the upper side wall of the pocket portion 11 (FIG. 7A and in FIG. 7B, the carrier tape opening R) was changed to three types of 0.1 mm, 0.2 mm, and 0.3 mm, and a vibration test was conducted to verify the presence or absence of run-on. The dimension of the convex portion 14 in the X direction was set to 0.3 mm.

7A and 7B, "x" indicates that the electronic component has run over the upper side wall of the pocket portion 11, and "o" indicates that the electronic component has run over the upper side wall of the pocket portion 11. indicate that you did not.

As described above, in general, the smaller the thickness of the electronic component (that is, the lower the height), the more likely it is to run over. .

In this regard, in the comparative example, as can be seen from FIG. 7B, such a tendency applies, and when the angle R of the upper side wall of the pocket portion 11 is relatively large at 0.3 mm, the thickness of the electronic component is 0.3 mm or less. Even if the angle R of the upper portion of the side wall of the pocket portion 11 is relatively small, 0.1 mm, the run-on occurs when the thickness of the electronic component is 0.1 mm or less.

In contrast, according to the present embodiment, as can be seen from FIG. 7A, the angle R of the upper portion of the side wall of the pocket portion 11 is relatively large, 0.3 mm, and the thickness of the electronic component is relatively small, 0.3 mm. Even if it is 05 mm, it is possible to prevent the electronic component from riding on the upper portion of the side wall of the pocket portion 11 .

By the way, when the length of the top cover tape 70 above the concave portion 20 is the same, the deeper the concave portion 20 is, the easier it is to apply tension in the X direction to the top cover tape 70 . Further, when the depths of the concave portions 20 are the same, the smaller the distance between the pocket portions 11 in the X direction (hereinafter, also referred to as the “inter-pocket distance”), the more tension is applied to the top cover tape 70 in the X direction. easier.

From this point of view, an appropriate value for the depth of the concave portion was confirmed by testing by changing the inter-pocket distance.

FIG. 8 is a table showing various parameters when the electronic component does not run over the upper portion of the side wall of the pocket portion 11. As shown in FIG. In FIG. 8, "A (pocket X dimension)" is the dimension of the pocket portion 11 in the X direction, "pitch" is a predetermined pitch Pt1, "between pockets" represents the distance between pockets, and "pocket The “inter-depth” is the depth of the recess 20 .

As shown in FIG. 8, when the distance between pockets is 1.6 mm or more and 3.0 mm or less (see Cases 12 to 28), if the depth of the concave portion 20 is 0.2 mm or more and 0.3 mm or less, the pocket No electronic component ran over the upper portion of the side wall of the portion 11 . Therefore, by setting the relationship between the inter-pocket distance and the depth of the recess 20 to such a relationship, it can be expected that the electronic component can be effectively prevented from running over the upper portion of the side wall of the pocket 11 .

Further, as shown in FIG. 8, when the inter-pocket distance is 1.0 mm or more and less than 1.6 mm (see Cases 1 to 11), if the depth of the concave portion 20 is 0.05 mm or more and 0.2 mm or less, , the electronic component did not ride on the upper portion of the side wall of the pocket portion 11 . Therefore, by setting the relationship between the inter-pocket distance and the depth of the recess 20 to such a relationship, it can be expected that the electronic component can be effectively prevented from running over the upper portion of the side wall of the pocket 11 .

Next, a method for manufacturing the carrier tape body 110 according to this embodiment will be outlined.

FIG. 9 is a perspective view schematically showing part of a mold 900 suitable for manufacturing the carrier tape body 110 according to this embodiment.

The mold 900 is for vacuum forming and includes a portion 902 for molding the pocket portion 11 and a portion 904 for forming the recess 20 .

The carrier tape body 110 according to this embodiment can be easily manufactured using a mold 900 as shown in FIG.

Note that the carrier tape body 110 may be formed by a method other than vacuum forming. For example, the carrier tape body 110 may be molded by press molding, pressure molding, or the like.

Although each embodiment has been described in detail above, it is not limited to a specific embodiment, and various modifications and changes are possible within the scope described in the claims. It is also possible to combine all or more of the constituent elements of the above-described embodiments.

11 pocket (embossed)
11a side wall 12 feed hole 14 convex portion 20 concave portion 22 bottom portion 70 top cover tape 70A top cover tape 71 joining region 71a linear region 71b linear region 71c dotted region 110 carrier tape main body 110A carrier tape main body

Claims (4)

A carrier tape body in which pockets capable of storing electronic components are provided at predetermined intervals in the longitudinal direction,
having recesses between the plurality of pocket portions in the longitudinal direction;
The position of the arrangement of the pocket portions along the longitudinal direction in the width direction of the carrier tape body and the position of the arrangement of the concave portions along the longitudinal direction in the width direction are the same,
The recess has substantially the same width in the direction perpendicular to the longitudinal direction as that of the pocket, and the top cover tape is joined when the top cover tape is attached so as to cover the pocket and the recess. A carrier tape body that functions as a joint. The distance between the plurality of pocket portions in the longitudinal direction is 1.6 mm or more and 3.0 mm or less,
2. The carrier tape body according to claim 1, wherein the recess has a depth of 0.2 mm or more and 0.3 mm or less. The distance between the plurality of pocket portions in the longitudinal direction is 1.0 mm or more and less than 1.6 mm,
2. The carrier tape body according to claim 1, wherein the recess has a depth of 0.05 mm or more and 0.2 mm or less. a carrier tape body having a plurality of pocket portions capable of storing electronic components, each provided at predetermined intervals in the longitudinal direction, and having recesses between the plurality of pocket portions in the longitudinal direction;
a top cover tape attached to the carrier tape body in a manner covering the pocket portion and the recess,
The position of the arrangement of the pocket portions along the longitudinal direction in the width direction of the carrier tape body and the position of the arrangement of the concave portions along the longitudinal direction in the width direction are the same,
The recess has a width that is substantially the same as that of the pocket portion perpendicular to the longitudinal direction,
A carrier tape, wherein the top cover tape is bonded to the recess.

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